Indicator for mills



July 291 A. SUNDH ET AL INDICATOR FOR MILLS Filed Oct. 8. 1920 2 Sheets-Sheet l A. SUNDH ET AL INDICATOR FOR MILLS Filed Oct. 8/ 1920 2 Sheets-Sheet 2 m m n an: Z

ATTO N EY Patented July 22, 1 924.

'' UNITED STATES PATENT OFFICE.

Aueusr sun-on, or ms'rmes crow nunson, NEW YORK, AND WILLIAM wnsrnam, or DETROIT, mcmean.

' mmcnron ron MILLS.

Application filed October 8, 1920. Serial No. 415,512.

'To all whom itmag concern:

Be it known that we, AUGUST SUNDH, a

citizen of the United States, and a residentv of a moving part of the mill, the device also.

being adapted to indicate the amount of material passing through the mill at any time.

In general, the invention relates to a device particularly adapted for application to a rolling mill, an ObJGOt of the application of this device to a rolling mill being to indicate the peripheral travel of a roll of the rolling mill and to indicate also the amount of material which is passed through the mill.

Another object of the invention is the provision of a device of the character designated which is automatically controlled, means aving been provided whereby the device is set in operation by the energiza tion of a relay energized by current drawn from the line by an electric motor which is employed for driving the mill.

A further object of the invention is the provision of a device of the character designated wherein the indicating element for indicating the travel of a roll of the rolling mill will be set in operation as soon as the rolls of the mill begin to rotate and wherein the other indicating element if not indicating the amount of material passed through the mill, will remain idle until the material is fed to the mill.

In the accompanying drawings wherein an embodiment of our invention has been illustrated,

Fig. 1' shows in part sectional elevation the device applied to a rolling mill;

Fig. 2 is a front elevation of the apparatus shown in Fig. 1;

Fig. 3 is an enlarged view of the indicating element and part of the driving means therefor; and

.Fig. a shows on an enlarged scale a magnetizable element adapted to be driven by a roll of the mill and which element constitutes a driving element for both indicating elements. I

Referring now to the drawings in detail, 1 and 2 designate respectively the upper and lower rolls of .a rolling mill to which our device is applied. It'is t be understood, however, that the device forming the subject-matter of this invention is capable of use with other than rolling 'niills if desired. The rolls 1 and 2 are supported for rotation in side frames 3 and are driven by an electric motor 1, the armature shaft of which carries a small spur gear 5 meshingwith a large gear 6'connected in the usual way to the rolls 1 and 20f the mill. The motor 4 receives its current from a source of electrical supply 7, the circuit for the motor being controlled by the usual switch 8, resistance 9 having been provided in the motor circuit as is customary. The metal to be rolled is conveniently supported on brackets 10 at one side of the machine, the

rolling metal as obviously the device is applicable to other types of machines.

Supported by one of the side frames 3 is a casing 12, this casing being supported by brackets 13 and 14 immediately above the upper roll 1 of the mill. Carried within the casing 12 at the upper part thereofin the present instance, are indicating elements 15 and 16 respectively, the indicating element 15 being adapted to register or indicate the peripheral travel of the roll 1 while the indicating element 16 is adapted to register or indicate the amount, of material, that is to say metal 11, passed between the rolls 1 and 2. Inasmuch as the particular type of indicating element, 15 or 16 as the case may be, does not form any part of the present invention, we have deemed it unnecessary to show the details of construction thereof, inasmuch as any of the wellknown forms of indicator now on the market are adapted for use in connection with our device.

Within the casing 12 and supported by a bracket 17 therein is a rotatable, mag

with a winding netizable or electrically controlled element or device 18 shown on an enlarged scale in Fig. 4. This element is adapted to engage or be engaged by the upper mill roll 1 and is provided for the purpose of driving the indicating elements 15 and 16. This element is .provided with a winding 19 and receives current from the source of power 7 in a manner which will be'hereinafter pointed out. The element 18 is provided with a shaft 20 mounted in bearings 21 and 22 in the bracket 17, this shaft carrying at one end a rotatable member 23-cooperating with contacts 24 and 25 and carrying at its other end a bevelled gear 26. The gear 26 is in constant mesh with a bevelled gear 27 mounted upon a vertically extending shaft 28, this shaft being adjustable. vertically, relative to a vertically extending shaft 29 in alinement therewith and carryingadja-v cent its upper end bevelled gears 30 and 31. The gear 30 meshes with a bevelled gear 32 carried upon a shaft 33, this shaft carrying one portion of a cone-clutch or electrically controlled device 34 presently to be described. The ear 31 is in constant mesh with the bevelled gear 35 carried upon a shaft 36, the latter constituting a'driving or actuating means for the indicating e1e-' men 15. It will be seen, therefore, that we have provided means including the magnetizable element or clutch 18 for operatively connecting the motor 4 to the indicator 15. The clutch 34 already referred to, comprises two portions 37 and 38,. the member 37 being-rigidly mounted upon the shaft 33 already referred to, while the member 38 is mounted upon and has longitudinal movement relative to a shaft 39 connected to the indicating element 16 and adapted to drive the same. The clutch 34 is electrically controlled, being provided 40 which when energized willcause the member 38 to move into clutching position relative to the member 37 so that if at that time the gear 32'and therefore the shaft 33 be rotating the shaft 39 will be driven to drive the indicating element 16. The winding 40 of the clutch 34 is adapted to receive current from the source of supply 7 and for this reason-is provided with contacts 41 and 42 and collector rings 43 and 44.

The electrically controlled element 18 is adapted to be ad'usted with respect to the casing 12 vertic y thereof, beingsecured to the casin by members 45 passing through slots 46 in tie-bracket 17. This adjustment is provided so that the element '18 may always be in engagement with the mill roll 1. As heretofore pointed out the shafts 28 and 29 are adjustable relative to each other, bein coupled together at 47 so that when the racket 17 is adjusted either up or down the shaft 28 will be carried with it.

This ensures that the gear trains will always be in mesh and the indicators 15 and 16 driven.

The wiring for our device is indicated in Fig. 1 from which it will be seen that the motor 4 receives its current from a supply 7 when the switch 8 is closed, the current passing through the motor from the positive side of the line by wayof conductor 48, resistance 9, initially, conductor 50 through the motor, conductor 51, winding 52 of a relay 53, conductor 54 to the negative side of the line. The closing of the switch 8 also closes a circuit to the winding 19 of the magnetizable element 18, this circuit being from the positive side of the line by way of conductors 55 and 56, contact 24, collector ring 23 through the winding 19, collector ring 23, contact 25, conductor 57, winding 52 of the relay 53, conductor 54 to the negative side of the line. The winding 19 being energized, the element 18 will adhere to the roll 1 of the rolling mill so that the latter will drive the former and through the gears 26, 27, 30 and 31 drive the indicating element 15. The circuit for the winding 40 of the clutch 34 is at this time open and therefore the indicating element 16 is not functioning. As soon, however, as the metal 11 is fed to the rolling mill, the increased load on the motor 4 will cause the latter to draw an increased current from the line so that the winding 52 of the relay 53 will be sufliciently energized to cause the relay 53 to function and lift a contact 58 into position to bridge stationary contacts 59 and 60. A circuit for the winding 40 of the clutch 34 will now be lows: From the positive side of the line I by way of conductors 48, 55, 61, 62 through the winding 40, conductor 63, contacts 59, 58 and 60, and conductor 64 to the negative side of the line. The energization of the winding 40 will cause the member 38 of the clutch 34 to travel into clutching position relative to the clutch member 37 so that the indicating element 16 will now be driven also to register the amount of material passed through the mill, the drive for this indicating element being from the shaft 20, gears 26 and 27, shafts 28 and 29, gears 30 and 32, through the clutch 34 ,to the indicating element. The relay 53 will maintain .its contact 58 in position to bridge the con:

mill and the loat is therefore relieved on the motor 4, the relay 53 will automatically drop this contact 48 to open'the circuit of the winding 40 of the'clutch 34 so that although the rolling mill may continue to be driven the indicating element 16 will not clutch 34 is controlled by the motor 4 in that the current drawn from the line due to the increased load on the motor when a strip is fed through the mill causes the clutch to function to operatively connect the indicator 16 to the mill.

From the foregoing it will be seen that we have provided a device adapted to be applied to a mill, which device is capable of registering the travel of a moving part. of the mill and which device is also capable,

of registerin the amount of material passed throng the mill, the indicating element for registering the travel of the moving part of the mill, however, being operable independently of the other indicating element. This results in a device which is capable at all times of registering the travel of some moving part of the mill and also one capable of registerin the amount of material passed through t e mill when the same is in operation. i It will be apparent also that we have rovided a device of the character describes in detail wherein the indicating element for registering the amount of material passed through the mill is under the control of the motor by which the mill is driven and isautomatic in its operation.

It will be obvious also that means have been provided for driving the indicating element whereby no slippage will occur between the mill roll and the element driven thereby which in turn drives the indicators, so that the indicators will always registeraccurately.

It is to be understood that while we have illustrated herein a particular embodiment of our invention, we are not to be limited to the exact details of structure so illustrated and herein described as obviouslychanges may be made therein within the purview of our invention.

What is claimed is: p

1. In combination, a mill, means for indicating the amount of material passed through said mill, an electric motor for driving the mill, a clutch for connecting the mill to the indicator, and means whereby said clutch is electrically connected to said motor to be controlled by the current passing through said motor.

2. In combination, a mill, means for indicating the amount !of material passed through said mill, a motor for driving the mill, an electric clutch, connections whereby said clutch is controlled by the current passing through the motor for operatively connecting the indicator to the mill.

3. In combination, a rolling mill, an indicator for indicating the amount .of material passing through said mill, an electric motor for driving said mill, an electricallyoperated clutch for said indicator, means whereby said clutch is operatively'connected to said motor, including means whereby the clutch is operable onl upon the increase in current flow due to oading of the motor when material is passed through the mill.

4. In combination, a rolling mill, an indicator therefor, and a clutch interposed be-' tween a roll of the mill and the indicator and comprising a winding adapted when energized to clutch the indicator to a roll of the mill to cause the roll to drive the indicator.

5. In combination, a rolling mill, a magnetizable roller for engaging a roll of said mill, an indicator for said'mill operatively connected to said roller, and means for energizin said roller to cause the same to be driven y the millroll to thereby drive the indicator. U

6. In combination, a rolling mill, an indicator for said mill and driven thereby, a connection between said mill and indicator whereby the same may be adjusted relative to each other, said connection comprising two relatively adjustable shafts, means operatively connecting said shafts, a motor for driving the mill, and an electrically-o erated means for connecting one of said ad ustable shafts to the indicator, the other of said .named indicator to function.

8. In combination, a mill, an indicator therefor, a motor for driving said mill, a circuit for said motor, and a relay in-said circuit for controlling said indicator, said relay being automatically operable to cause the indicator to function, only by the excess current passing through the motor when the mill is being driven under load by saidmotor. 4

9. In combination, a mill, an indicator therefor, an electric clutch, a rela a motor for driving said mill, said relay eing controlled by the load on said motor and in turncontrolling said clutch, and a drive shaft which is adapted to beconnected to said dicator by sa1d clutch.

10. In combination, a mill, an indicator therefor, an electric motor for driving said mill, a drive shaft, an electric clutch for This specification signed this 236. day of v connecting the indicator to the drive shaft, a Sept., 1920.

magnetizable element for connecting the AUGUST SUN])H drive shaft operatively to the'mill, and a re- I lay. controlled by the current passing T1115 speclficatlon slgned thls 27th y of through said motor for closing a circuit to p -7 'said clutch. v WM. WESTERMAN. 

